The Workhorse octopus regulator has been the standard in SCUBA diving for years. Why? Its rugged, simplistic, dependable, low cost design lends itself for use as a reliable octopus Regulator. The Workhorse octopus is O2 service ready with a Venturi Adjustment Switch, made of corrosion and impact resistant Glass Filled Delrin for long life and dependability, and now comes standard with (1) Black (installed) (1) Green (Oxygen), (1) Yellow (Nitrox) cover and a 40" hose.